采动覆岩破坏及离层发育特征的三维数值模拟  

3D Numerical Simulation of Overlying Strata Broken and Separation Induced by Mining

作　　者：王金山[1] 王忠昶[2] 

机构地区：[1]内蒙古科技大学高等职业技术学院,内蒙古包头014010 [2]大连交通大学土木与安全工程学院,辽宁大连116028

出　　处：《煤矿开采》2011年第6期22-26,共5页Coal Mining Technology

基　　金：国家自然基金资助项目(51009015);辽宁省教育厅科学技术研究基金资助项目(L2010038)

摘　　要：为了获得煤层采动覆岩移动及离层空间分布特征,考虑覆岩的碎胀性,根据抗弯刚度的不同在相应的界面设置接触单元,以基本顶初次跨落为时间起点,以初次跨落步距为初次开挖长度,以周期来压步距为开挖步长,以来压周期为开挖周期,应用数值模拟手段,获得了水平煤层开采时的覆岩破坏、移动与变形及离层的发展与分布的时空规律,确定了可充填离层的区域范围,为指导实施离层充填减沉技术及工程实践提供了科学依据。In order to obtain the characteristic of overlying strata movement and separation induced by mining, taking rock＇s bulking property into account, this paper applied numerical simulation to researching time-space rules of breakage, movement and deforma- tion, separation development and distribution of overlying strata in mining sub-horizontal coal-seam. In simulation, first roof caving pace was input as first excavation length, periodical pressure pace as excavation step length and periodical pressure time as excavation period. Results were also be used to confirm the range of stowing separation which provided scientific basis for reducing subsidence by stowing technology.

关 键 词：覆岩 离层 接触单元 抗弯刚度 

分 类 号：TD325.2[矿业工程—矿井建设]